const mergeArray = function(arr1,arr2,arr3){
  if(arguments.length <= 1){
    return false;
  }
  var concat_ = function(arr1,arr2){
    var arr = arr1.concat();
    for(var i=0;i<arr2.length;i++){
      arr.indexOf(arr2[i]) === -1 ? arr.push(arr2[i]) : 0;
    }
    return arr;
  }
  var result = concat_(arr1,arr2);
  for(var i=2;i<arguments.length;i++){
    result = concat_(result,arguments[i]);
  }
  return result;
}

export default mergeArray
